Carpal Tunnel Syndrome
Patients usually report that one or both hands feel numb, this can be associated with “tingling” or “pins and needles”. Many patients are woken from their sleep with a numb hand.
The condition is caused by interference with the normal working of the median nerve (which supplies sensation to the thumb, index, middle and ring fingers, and motor nerve supply to the muscles at the base of the thumb.)
Additional information can be found at:
https://www.bupa.co.uk/health-information/muscles-bones-joints/carpal-tunnel-syndrome
and
https://www.bssh.ac.uk/patients/conditions/21/carpal_tunnel_syndrome